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Statement of Changes in Consolidated Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Common stock, dividends per share	$ 0.12	$ 0.18	$ 0.24	$ 0.36
Preferred Class A [Member]
Preferred, dividends per share	1.875	1.875	3.75	3.75
Preferred Class B [Member]
Preferred, dividends per share	$ 6.71875	$ 6.71875	$ 20.1563	$ 20.1563

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

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